Attachment for spirit-levels.



'Patented Oct. 2|, |902.

W. OVENS.

ATTACHMENT FDR SPIRIT LEVELS.

(Application led May 23, 1902,)

No. 7||,88D.

(No Model.)

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IN VEN T OR. /fe/y/m 0xff/26.

A TTORNEY.

UNITED STATES PATENT OFFICE.

WELLINGTON OVENS, OF SILVERTON, COLORADO.

ATTACHMENT FOR SPIRIT-LEVELS.

SPECIFICATION forming' part Of Letters Patent NO. 711,889, dated October21, 1902.

Application led May 23, 1902. Serial No. 108,721. (No model.)

To @ZZ whom it may concern,.-

Be it known that I, WELLINGTON OvENs, a citizen of the United States ofAmerica, residing at Silverton, in the county of San Juan and State ofColorado, have invented certain new and useful Improvements inAttachments for Spirit-Levels; and I do declare the following to beafull, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, andto thefigures of reference marked thereon, which form a part of thisspecification. p

My invention relates to an improved attachment for spirit-levels; and itconsists of a device attached to one end of the level-bar and adapted tobe adjusted to measure the inclination of a surface as compared with thehorizontal or vertical.

My object is to provide a device of this class which shall be simple inconstruction, economical in cost, reliable, durable, and efficient inuse 5 and to these ends the invention consists of the featureshereinafter described and claimed, all of which will'be fully understoodby reference to the accompanying drawings, in which is illustrated anembodiment thereof.

In the drawings, Figure 1 is a perspective view of a spirit-levelprovided with my improved attachment. Fig. 2 is a section taken on theline 2 2, Fig. 3. Fig. 3 is an end elevation of a spirit-level providedwith my irnprovements.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate the bar of the ordinary spirit-level, to oneend of which, as shown in the drawings, is attached a plate 6 by meansof screws 7. To this plate a bracket 9 is made fast by means of athumb-screw 8. The bracket is also provided with a lug 10d, which entersa socket formed in the plate 6. In the sides of this bracket are formedways in which a plate 10 is slidable. The central portion of the plateis cut out to make room for the thumb-screw S and to permit the plate toslide vertically orvat right angles to the length of the bar 5. The topof the plate 10 projects outwardly, as shown at 10, and this projectionis provided with a threaded opening to receive an adjusting-screw 12,which is j ournaled in the outwardly-projecting top part 9 of thebracket. This screw is provided with a milled head 12, which forms ashoulder engaging the bracket above, while a collar 13 is made fast tothe screw immediately below the bracket part 9a, w-hereby the screw isprevented from traveling in either direction.

From the construction and arrangement described it is evident that asthe screw 12 is turned the plate 10 may be moved up and down at will.The lower part 10c of the plate is graduated to enable the user todetermine the exact degree of the inclination of an'y surface consideredwith reference to either a vertical or horizontal plane.

It is evident that the 4details of construction as herein described maybe varied at pleasure. lf the bar 5 is made of metal, the plate 6 maybedispensed with and the bracket-plate 9 secured directly to the end ofthe bar. As shown in the drawings, the top of the head 12a of the adjusting-screw is in the same plane with the upper edge or top of theplate 6. For small or narrow levels the plate 6 may be made shorter,while the other parts may be made of uniform size. In this event thehead 12a of the screw will project above the top or upper longitudinaledge ofthe level.

When in use, the level is placed upon the surface, and if the bubble ofthe glass tube 14 for horizontal surfaces or of the tube 15 for verticalsurfaces indicates an inclination the screw 12 is turned to project theplate 10 below or beyond the edge 5 of the instrument, which edge forthe purposes of this specification will be termed the lower edge, whilethe opposite edge is for convenience termed the upper edge. Thegraduated part l0c of the slidable plate should be projected until thebubble indicates that the bar 5 is either horizontal or vertical, asdesired.

The degree of the projection will be indicated IOO bracket to the bar, aplate slidable in the ways of the bracket, said plate being cut out inthe center to make room for the set-screw, the plate being provided witha projection at the top extending at right angles to the body of theplate and provided with a threaded opening, the bracket having a topprojection located above the projection of the plate, and an adjlisting-screw journaled in the bracket projection and threaded in theprojection of the slidable plate, substantially as described.

2. The combination with a level of the class described, of a plateattached to one end thereof, a bracket provided with a lug adapted toenter an opening in the stationary plate, the bracket also having athreaded opening registering with the threaded opening in the plate, thebracket having a projection eX- tending outwardly from its top and beingprovided with side projections in which are formed Ways open at thebottom, a plate slidable in the Ways bf the bracket and having aright-angular projection atl its top, said projection being providedwith a threaded opening, the central portion of the slidable plate beingcut away, an adjusting-screw journaled in the bracket projection andthreaded in the projection of the slidable plate, and a set-screwengaging the threaded openings of the bracket and stationary plate tohold the bracket in place, substantially as described. l

In testimony whereof I affix my signature in presence of two witnesses.

WELLINGTON OVENS. Witnesses:

DENA NELSON, A. J. OBRIEN.

